05000334/LER-1981-060-03, /03L-0:on 810616,during Operations Procedure to Dampen Axial Xenon Oscillations,Delta Flux Outside of Target Band Alarm Was Received When Flux Left High Side of Target. Caused by Xenon Oscillation.Procedures Revised

/03L-0:on 810616,during Operations Procedure to Dampen Axial Xenon Oscillations,Delta Flux Outside of Target Band Alarm Was Received When Flux Left High Side of Target. Caused by Xenon Oscillation.Procedures Revised

ML20009E644
Person / Time
Site:	Beaver Valley
Issue date:	07/15/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009E638	List: 05000334/LER-1981-060, Forwards LER 81-060/03L-0 05000334/LER-1981-060-03, /03L-0:on 810616,during Operations Procedure to Dampen Axial Xenon Oscillations,Delta Flux Outside of Target Band Alarm Was Received When Flux Left High Side of Target. Caused by Xenon Oscillation.Procedures Revised
References
LER-81-060-03L, LER-81-60-3L, NUDOCS 8107280332
Download: ML20009E644 (2)

LER-1981-060, /03L-0:on 810616,during Operations Procedure to Dampen Axial Xenon Oscillations,Delta Flux Outside of Target Band Alarm Was Received When Flux Left High Side of Target. Caused by Xenon Oscillation.Procedures Revised

Event date:
Report date:
3341981060R03 - NRC Website

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EVENT DATE 14 75 REPORT D ATE 80 EVENT OWSCRIPTION AND PROB ABLE CONSEQUENCES h I) !2! l on 6/16/81 at 2259 hours0.0261 days <br />0.628 hours <br />0.00374 weeks <br />8.595495e-4 months <br /> with reactor nnwer at 1007 the " Delta Flux Outside Of I

l;!3) l Target Band" alarm was received when delta flux left the high side of its target l

I: lal I band for a period of 5 minutes. At the time, an operations procedure to dampen i

I~++l l axial xenon oscillations was in progress. Power operations continued within the l

I; 66 I I linitations of Technical Snecification 3.2.1.

The health and safety of the public j I: I'l I was not ieonardized due to the short duration of time spent outside the band.

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l-l;; l i'lJl monitoring the oscillations per procedure which was not the most restrictive l

l 1:1 l channel with respect to target flux. The procedure has since been revised to use 1

ii-1l the most conservative channel available. No future actions are planned.

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f Attachment to LEll 81-60/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.

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